Improvement in ventilators



B. F. MILLER.

Improvement in Ventilators.

AM murmur/100mm: cm In] assume: Pam-m.)

- No 115,339. Patented M'a'y'30, 1871.

. ENJAMIN r. MILLER, on NEW YORK, N. Y.

IMPROVEMENT IN VENTILATORS.

I ro an whom it may concern:

Be it known that I, BENJAMIN F. MILLER, of the city and State of New York, have in vented and made an Improvement in Ventilators; andthe following isdeclared to be a correct description of the same.

In Letters Patent granted to me October 2, 1865, No. 13,620, aventilator is shown in which there is a cone over the ascending-flue and within an inclosing-case, whereby the passage of currents of cold air into thechimneyis prevented and the downward currents are deflected. I combine with the said coneordisk I Y j a conical perforatedcasing around the upper end'of the chimney.

. I I have discoveredthat a metallic perforated cone deflects currents of air and prevents the atmosphere blowing into the chimney, because the wind,jstrikingthe surface of the cone, is deflected therefrom,and the deflected current crossing the openings or perforations is sufficiently powerful to divert the whole or a large portion of the currents of air which I would otherwise pass directly into the perforations, and the openings on the side against which the winddoesnot blow act to give a very free vent to the gases or products of combustion. Furthermore, by combining with the said perforated casing the coneor disk over the chimney-flue, the operation is rendered .much more perfect and complete, so that warmth is maintainedin the chimney.

In the drawing, Figures 1, 2, and 3 are vertical sections of my said ventilators in the varying-forms inwhiclr I make use of the same 5 and Fig. 4 is a plan of the perforated cone.

The flue a is of any suitable size or shape, and above it the cone or disk I) is sustained by vertical plates or tie-bars or strips 0 c. i There should be sufficient distance between the plate or cone and the upper end of the flue to allow a free escape equal to the sectional area of the flue (1. Around the upper end of the. flue a. and the disk or cone?) is the perforated cone 6, the openings in which are numerous; and I prefer that said open in gs should be round 5 but the same might be elongated or ornamental. The cone may extend around the upper end of the flue a. in the shape shown in Fig. l; or

it may be contracted to a cylindrical skirt, f,

the flue-pipe a, substantially as and for the purposes set forth.

Signed by me this 11th day of April, 1871. .VVitnesses: B. F. MILLER.

CHAS. E. SMITH, GEo. T. PINGKNEY.

NT OFFICE. 

